JP7306208B2 - Joint structure of pipe members - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pipe member joint structure that is suitably used for a shelf or the like having a frame structure of pipe members.

Conventionally, as a joint structure of this type of pipe member, a structure in which a horizontal pipe member is connected to a vertically extending vertical pipe member is known (see, for example, Patent Document 1).

However, in the conventional one, a pair of slits are provided at each horizontal pipe member mounting location of the vertical pipe member, and a pair of claws are provided on each horizontal pipe member side, and the claws are hooked to the slits. By stopping, the horizontal pipe member is connected to the vertical pipe member. Therefore, when trying to connect the horizontal pipe members perpendicular to each other at the same height position of the vertical pipe member, the insertion dimension of each claw into the vertical pipe member must be shortened (Problem 1).

As a solution to the problem 1, the claws of the horizontal pipe members that are orthogonal to each other are crossed on the outside of the vertical pipe member, and the claws are hooked to the vertical pipe member from the same direction. known (see, for example, Patent Document 2).

However, in such a construction, since the claws cross each other, there is a problem that when one horizontal pipe member is removed, the claw on the other horizontal pipe member side is largely exposed. In order to remove it, one of the horizontal pipe members must be removed once from the vertical pipe member, which is troublesome (problem 2).

Japanese Patent No. 3218606 Japanese Patent No. 3218601

The present invention has been made in view of such circumstances, and aims to simultaneously solve the problems 1 and 2 described above.

The joint structure for pipe members according to the invention of claim 1 comprises: a pipe-shaped first pipe member having slits in substantially orthogonal directions; The second and third pipe members are attached to the walls of the member in orthogonal postures, respectively, and the claws on the second pipe member side and the claws on the third pipe member side are connected to the third pipe member. Inside one pipe member, the number and positions of the claws are set so that the claws on one pipe member side face the side surfaces of the claws on the other pipe member side and do not cross each other.

The pipe member joint structure according to the invention of claim 2 is the pipe member joint structure of claim 1, wherein the second pipe member is paired on both sides of the first pipe member in a straight posture. It is distributed without

A pipe member joint structure according to the invention of claim 3 is the joint structure of claim 1 or 2, wherein a pair of claws on the second pipe member side are provided, and the claws on the third pipe member side are provided. is provided only one.

The pipe member joint structure according to the invention of claim 4 is the pipe member joint structure according to claim 1, 2 or 3, wherein the second and third pipe members are connected through the connection member having the claw. The connecting member is attached to the first pipe member, and the connecting member includes a connecting member main body accommodated inside the corresponding pipe member, and a connecting member main body protruding from the connecting member main body and extending to the outside from the tip of the corresponding pipe member. and the claws to be used.

The pipe member joint structure according to the invention of claim 5 is the pipe member joint structure according to claim 4, wherein the connecting member main body is fastened to the corresponding second and third pipe members by a single screw. A pipe member pressing mechanism is provided between the connecting member main body and the pipe member to press the tip of the pipe member against the peripheral wall of the first pipe member by using the tightening force of the screw. It is what is done.

According to the present invention, the problems 1 and 2 described above can be solved at the same time, the insertion dimension of the claws into the first pipe member can be reasonably secured, and the degree of freedom in assembling the pipe members can be increased. It is possible to provide a pipe member joint structure that can

1 is an overall perspective view of a shelf according to one embodiment of the present invention; FIG. The perspective view of the state which removed the shelf board and inset panel which concern on the embodiment partially. The perspective view of the state which removed all the shelf boards and inset panel which concern on the same embodiment. FIG. 4 is an enlarged perspective view of the vicinity of a slit for attaching a hook according to the same embodiment; FIG. 4 is an enlarged perspective view of the vicinity of a slit for attaching a hook according to the same embodiment; The whole perspective view which shows the frame structure of the main unit of the shelf which concerns on the same embodiment. The exploded perspective view which shows the connection member which concerns on the same embodiment. The figure which shows the hook which concerns on the same embodiment. FIG. 4 is a diagram showing a connection mode of frames according to the same embodiment; FIG. 4 is a diagram showing a connection mode of frames according to the same embodiment; FIG. 4 is an exploded perspective view showing a mounting mode of the orthogonal increasing unit according to the same embodiment; FIG. 12 is an enlarged view of a main portion of FIG. 11; FIG. 4 is an exploded perspective view showing a connecting member for increasing the number of stations according to the same embodiment; FIG. 4 is a plane cross-sectional view of a main part of the shelf according to the same embodiment; FIG. 14 is an enlarged view of the C part in FIG. 14; The figure which shows the joint aspect of the flame|frame which concerns on the same embodiment.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 16. FIG.

In this embodiment, the pipe member joint structure of the present invention is applied to a shelf S in which an orthogonal additional unit S2 is connected to one end of a main unit S1.

As shown in FIGS. 1 to 3 and 5, the main unit S1 of the shelf S consists of a frame structure 1 made of pipe members, and shelves 2 and insets detachably attached to the frame structure 1. A panel 4 is provided.

A detailed description of the main unit S1 of the shelf S of this embodiment is as follows.

The main unit S1 of this shelf S is as shown in FIGS. An inset having shelf plates 2 detachably adjacent to frames 11A and 11B and forming joints 13A and 13B between the frames 11A and 11B and locking parts 42 and 43 inserted into the joints 13A and 13B. A panel 4 is provided.

As shown in FIGS. 1 to 3 and 6, the frame structure 1 includes six struts 15 arranged at both left and right ends and at the center in the width direction (hereinafter, those located at both left and right ends in FIG. 1 are referred to as "struts 15A"). , and the one located in the center in the width direction may be referred to as a ``support 15B''. 1 frame 11A and a second frame 11B connecting the left and right facing columns 15 to each other. The main unit S1 of the shelf S of this embodiment is of a two-level type, and includes three sets of first frames 11A arranged at the left end, the center, and the right end, respectively, and a pair of front and rear second frames 11B. Six sets are provided, and the shelf boards 2 are arranged inside the first and second frames 11A and 11B of each stage. In this arrangement state, the mounting surface q of the shelf board 2 and the upper surface p of the corresponding frames 11A and 11B are substantially flush with each other, and as shown in FIG. For example, joints 13A and 13B each having an opening width dimension w of about 2 mm are formed.

As shown in FIGS. 1 to 6, the column 15 is composed of a prismatic pipe member having a substantially square cross section, and has an adjuster 151 at its lower end and a column cap 152 attached to its upper end. In this embodiment, the strut 15 and the first frame 11A, which face each other in the front and rear direction, are rigidly connected by welding or the like to form a ladder-like frame structure as shown in FIG. Supports 15 facing left and right and a second frame 11B constructed between these supports 15 are detachably connected via connecting members 16, respectively.

The first frame 11A is composed of a prismatic pipe member having the same cross-sectional shape as the support 15. As shown in FIGS. It has a slit t for hook attachment. The second frame 11B is composed of a prismatic pipe member having the same cross-sectional shape as the strut 15 and the first frame 11A.

A connecting member 16 for connecting the second frame 11B to the support 15 connects the support 15 and the second frame 11B without being exposed to the outside, as shown in FIGS. Furthermore, by attaching and detaching one screw 161, the post 15 and the frame 11B can be attached and detached. Specifically, as shown in FIGS. 7, 9, 10 and 15, the connecting member 16 includes a connecting member main body 162 fitted into the end of the frame 11B and one end of the connecting member main body 162. It is provided with two claws 163 that are protruded from the support 15 and are inserted into the slits u for attaching the second frames 11B. 7, 9 and 10, the connecting member main body 162 includes a bottom plate 162a, side plates 162b erected from both side edges of the bottom plate 162a, and nut units 162c mounted between the side plates 162b. , and the bottom plate 162a and the side plates 162b are a metal integral piece. The bottom plate 162a is provided with a screw insertion hole v associated with the nut unit 162c. The nut unit 162c includes an elastically deformable synthetic resin nut holder 162d and a nut 162e held on the bottom surface of the nut holder 162d so as not to rotate. The nut holder 162d is box-shaped with elastic claws x on both side walls, and a nut 162e is mounted in a hexagonal hole provided on the bottom wall. The nut holder 162d is press-fitted between the side plates 162b having the locking holes y of the connecting member main body 162 so that the elastic claws x thereof engage with the locking holes y of the side plates 162b. In this engaged state, the nut holder 162d is attached between the side plates 162b, and the nut 162e is held at a position facing the screw insertion hole v of the connecting member main body 162. As shown in FIG. The two claws 163 of the connecting member 16 are straightly extended from the side plates 162b, and extend in parallel with the same separation distance as the side plates 162b.

The structure of the connecting portion between the column 15 and the frame 11B by the connecting member 16 will be described with reference to the assembly procedure as follows. First, as shown in FIG. 9, the hook 163 of the connecting member 16 is inserted into the slit u in the side surface of the support 15 and hooked. Since the claw 163 has an upward hook shape, in this state, the connecting member 16 cannot be moved straight and horizontally away from the column 15 without being tilted. At this time, only the lower edge 163b1 of one claw 163 contacts the lower edge of the slit u on the side surface of the support 15, and the lower edge 163b2 of the other claw 163 does not contact the lower edge of the slit u on the side surface of the support 15. The shape of each claw 163 is set as follows. That is, by bringing only one claw 163 into contact with the lower edge of the slit u on the side surface of the support 15, the connecting member 16 is held by the support 15 in a stable posture. In this posture, the end of the frame 11B is fitted onto the connecting member main body 162, and the tip z of the frame 11B is brought into contact with the column 15. As shown in FIG. At this stage, the outer screw insertion hole f drilled in the frame 11B, the inner screw insertion hole v drilled in the bottom plate 162a of the connecting member 16, and the screw hole g of the nut 162e substantially correspond to each other. Then, by tightening the screw 161 screwed into the nut 162e through the outer screw insertion hole f and the inner screw insertion hole v from below, the connection between the column 15 and the frame 11B is completed as shown in FIG. . In this embodiment, as the screw 161, a countersunk screw type having a tapered surface 161t on the head portion is used. Tapered surfaces ft and vt corresponding to 161t are provided, respectively. At the stage where the end portion of the frame 11B is fitted onto the connecting member main body 162 and the tip z of the frame 11B is brought into contact with the column 15 without being pressed, the axial center c1 of the nut 162e and the inner screw insertion hole v does not move. On the other hand, the dimensions are set so that the axis c2 of the outer screw insertion hole f deviates in the direction away from the strut 15 by the minute dimension d0. Although this minute dimension d0 is set to a small value that allows the screw 161 to be screwed into the nut 162e through the screw insertion holes f and v, it is exaggerated in FIG. be. When the screw 161 is screwed into the nut 162e and then tightened, the tapered surface 161t of the screw 161 finally tapers the screw 161 as shown in FIG. The surface 161t comes into close contact with the tapered surfaces ft and vt of the screw insertion holes f and v, thus completing the connection work. Due to the centripetal action of the tapered surface 161t of the screw 161 tightened in the process, the frame 11B is biased toward the support 15 relative to the connecting member 16, and the tip z of the frame 11B is pressed against the support 15. It will be. Further, the claw 163 is also relatively biased toward the support 15 by the centripetal action of the tapered surface 161 t of the screw 161 described above, and the inner surface 163 c of the claw is pressed against the support 15 . That is, by attaching a single screw 161 to the connecting portion between the column 15 and the frame 11B in this embodiment, fixing of the frame 11B to the connecting member 16 and pressure contact of the frame 11B to the column 15 are performed simultaneously. A pipe member pressing mechanism P is incorporated.

The shelf board 2 is, for example, made of sheet metal and has a square shape in plan view, and as shown in FIG. It is detachably arranged in the space surrounded by the first and second frames 11A and 11B while being supported by the hook 14 hooked on the frame. A joint 13A between the shelf board 2 and the first frame 11A is formed by a convex portion 140 provided on the hook 14. As shown in FIG. The joint 13B between the shelf board 2 and the second frame 11B is formed by contacting the second frame 11B with projections (not shown) provided on two parallel side surfaces of the shelf board 2. As shown in FIG. As shown in FIG. 8, each hook 14 is inserted into the frame through a hanging plate 141 attached to the inner surface of the frame 11A and a slit t provided at the upper end of the hanging plate 141 and formed in the frame 11A. and a shelf support plate 143 extending from the lower end of the hanging plate 141 toward the shelf plate 2, and are integrally made of a sheet metal material. A hanging plate 141 of the hook 14 is provided with a convex portion 140 that contacts the side surface of the shelf plate 2 . The projecting portion 140 is a portion of the hanging plate 141 integrally protruded in the direction of the shelf plate 2, and the total dimension of the material thickness dimension of the hanging plate 141 and the bulging dimension of the projecting portion 140 is the opening width of the joint 13A. It is set to be the same as or slightly smaller than the dimension w.

As shown in FIGS. 1 and 2, the inset panel 4 includes a square panel body 41 capable of blocking the space surrounded by the support 15 and the first or second frames 11A and 11B, and this panel body Locking portions 42 and 43 extending vertically from 41 and inserted into joints 13A and 13B formed between the first or second frames 11A and 11B and the shelf plate 2 are provided. The panel body 41 has a thickness dimension substantially equal to the left-right width dimension of the column 15 , and the outer surface and the inner surface of the panel body 41 are substantially flush with the outer surface of the column 15 in the mounted state. The locking portions 42 and 43 of this embodiment have a thickness dimension smaller than the opening width dimension w of the joints 13A and 13B into which they are to be inserted. Since the inset panel 4 is slightly slanted, the inset panel 4 does not rattle when inserted into the joints 13A and 13B.

In order to mount the inset panel 4 described above so as to enclose the storage space formed between the upper and lower shelf boards 2, for example, the upper shelf board 2 is lifted and the inset panel 4 is placed under the inset panel 4. The locking portion 43 is inserted into the joints 13A and 13B formed between the lower shelf plate 2 and the frames 11A and 11B, and then the upper shelf plate 2 is returned to its normal position to engage the upper portion. This is done by positioning the stop portion 42 within the joints 13A and 13B formed between the upper shelf plate 2 and the frames 11A and 11B.

The shelf S of this embodiment is obtained by connecting an orthogonally increasing unit S2 to one end of the main unit S1 described above. As shown in FIGS. 1 to 3 and 11, this orthogonal additional unit S2 includes two struts 17 arranged at the ends, a first frame 11A connecting the two struts 17, and the A third frame 11C is provided for connecting the struts 17 of the orthogonal additional unit S2 and the struts 15 of the main unit S1. This orthogonal extension unit S2 is also of a two-stage type, and has three first frames 11A arranged at the ends and three pairs of third frames 11C forming left and right pairs.

The strut 17, the first frame 11A and the third frame 11C are all made of pipe members having the same structure as the strut 15 and the first frame 11A in the main unit S1. 171 is an adjuster provided at the lower end of the support 17 and 172 is a support cap provided at the upper end of the support 17 . Here, the column 17 and the first frame 11A facing each other on the left and right sides are rigidly connected by welding or the like, and as shown in FIG. 11, a ladder-like frame structure is formed. As shown in FIG. 14, the third frame 11C is detachably connected to the strut 17 via the connecting member 16. The connecting structure is different from the strut 15 by the connecting member 16 of the main unit S1 described above. and the second frame 11B. That is, the pipe member pressure contact mechanism P is also incorporated in the connecting portion between the strut 17 and the third frame 11C.

As shown in FIG. 14, the orthogonal additional unit S2 is connected to the main unit S1 by connecting the third frame 11C to the front strut 15 of the main unit S1.

As shown in FIGS. 15 and 16, slits u2 for mounting the third frame 11C are provided on the front surface of the support 15 at the front center and right end of the main unit S1. The slits u2 are provided one by one in the same longitudinal direction as the slit u for attaching the second frame 11B of the support 15. As shown in FIG.

As shown in FIGS. 14 and 15, the connecting member 18 for increasing the number of stations for connecting the third frame 11C to the support column 15 of the main unit S1 is connected to the support column 15 and the third frame 11C without being exposed to the outside. As shown in FIGS. 12 and 16, the column 15 and the frame 11C can be attached and detached by attaching and detaching one screw 181. As shown in FIG. As shown in FIGS. 12, 13 and 16, the connecting member 18 for increasing the number of stations has the same configuration as the connecting member 16 of the main unit S1 except that it has one claw 183. Corresponding portions are denoted by the same reference numerals as those of the connecting member 16, and description thereof is omitted. One claw 183 of the connecting member 18 is formed by bending and extending an end of one side plate 162b, and is arranged at a central position equidistant from both side plates 162b. In addition, the structure of the connecting portion between the strut 15 of the main unit S1 and the third frame 11C by the connecting member 18 for increasing the number of stations is also the same as the structure of the connecting portion between the strut 15 and the second frame 11B by the connecting member 16 of the main unit S1 described above. Similar to the structure of a part. That is, the pipe member pressing mechanism P is also incorporated in the connecting portion between the support 15 of the main unit S1 and the third frame 11C.

With the orthogonal additional unit S2 connected to the main unit S1 in this way, shelf plates 2 are arranged inside the first to third frames 11A to 11C of each stage. Horizontal hooks are attached near both ends of the inner surface of the first frame 11A of the orthogonal additional unit S2 and the outer surface of the second frame 11B in the front right half of the main unit S1 as shown in FIG. A slit t for is provided. The shelf board 2 has the same structure as the shelf board 2 of the main unit described above, and is detachably arranged inside the frames 11A to 11C supported by the hooks 14 hooked on the hook attachment slits t. ing. Since each hook 14 has the same configuration as the hook 14 in the main unit S1 described above, the same reference numerals are given to the corresponding portions and the description thereof is omitted. In this arrangement state, the mounting surface q of the shelf plate 2 and the upper surface p of the corresponding frames 11A to 11C are substantially flush with each other, and an opening width of, for example, about 2 mm is provided between each of the frames 11A to 11C and the shelf plate 2. Joints 13A-13C each having a dimension w are formed. The joints 13A, 13B between the first and second frames 11A, 11B and the shelf board 2 are formed by projections 140 provided on the hooks 14 . A joint 13C between the third frame 11C and the shelf board 2 is formed by a projection (not shown) provided on the side surface of the shelf board 2. As shown in FIG.

The inset panel 4 is mounted using the joint 13C between the third frame 11C and the shelf board 2.例文帳に追加The manner in which the inset panel 4 is attached is the same as that in the main unit S1 described above, so a detailed description thereof will be omitted.

The pipe member joint structure according to the present invention is adopted for the pipe member connection portion X and the pipe member connection portion Y of the shelf S described above.

First, at the pipe member connecting portion X, the second frame 11B (second pipe member) is arranged in a pair on both sides of the strut 15B (first pipe member) so as to form a straight line. In addition, a third frame 11C (third pipe member) orthogonal to the second frame 11B is connected to the support 15B at the same height position (longitudinal position) as the second frame 11B. That is, in this pipe member connection portion X, a post 15B (first pipe member) having a pipe shape and having slits u and u2 in substantially orthogonal directions, and claws 163 and 183 of connecting members 16 and 18 are connected. It comprises second and third frames 11B and 11C (second and third pipe members) that are attached to the walls of the support 15B (first pipe member) in orthogonal postures by inserting them into the slits u and u2. The claws 163 on the second frame 11B (second pipe member) side and the claws 183 on the third frame 11C (third pipe member) side are connected to the posts 15B (first pipe member). ), the insertion end 163a of the second frame 11B (second pipe member) side claw 163 (one pipe member side claw) is inserted into the third frame 11C (third pipe member) side claw. The number and positions of the claws 163, 183 are set so that they face the side surface 183s of the claw 183 (the claw on the other pipe member side) and do not cross each other. That is, in this embodiment, a pair of claws 163 on the side of the second frame 11B (claws on the side of the second pipe member) are provided, and claws 183 on the side of the third frame 11C (claws on the side of the third pipe member). is provided only one.

In this embodiment, the second and third frames 11B and 11C (second and third pipe members) are connected via connecting members 16 and 18 having claws 163 and 183, respectively, as described above. It is attached to the strut 15B (first pipe member).

Each connecting member main body 162 of the connecting members 16, 18 is fastened to the corresponding second and third frames 11B, 11C (second and third pipe members) by one screw 161, 181, respectively. Between the connecting member body 162 and the frames 11B and 11C (second and third pipe members), tightening forces of screws 161 and 181 are used to secure the frames 11B and 11C (second and third pipe members). A pipe member pressing mechanism P is provided for pressing the tip z of the pipe member) against the peripheral wall of the support 15B (first pipe member).

That is, the column 15B (first pipe member) of this embodiment has a prismatic pipe shape, and a pair of slits u are provided in the opposing peripheral walls 15s. A single slit u2 is provided at 15t. Thus, the tip z of the second frame 11B with the two claws 163 hooked to the pair of slits u is pressed against the peripheral wall 15s by the pipe member pressure contact mechanism P incorporated in the connecting member 16, and one claw 183 is pressed. A tip z of the third frame 11C hooked to the single slit u2 is pressed against the peripheral wall 15t by a pipe member pressing mechanism P incorporated in the connecting member 18. As shown in FIG. Further, due to the action of the pipe member pressing mechanism P, the inner surface 183c of the claw 183 is pressed against the inner surface of the peripheral wall 15t of the support 15B.

On the other hand, in the pipe member connection portion Y, as shown in FIG. 14, one second frame 11B (second pipe member) and one third frame 11B (second pipe member) are attached to the post 15A (first pipe member). frame 11C (third pipe member) are connected to each other in an orthogonal posture.

Here, FIG. 1 is a front side perspective view of this shelf S. As shown in FIG. FIG. 2 is a front perspective view of the shelf S with some of the shelf boards 2 and inset panels 4 removed, and FIG. is a front side perspective view of the. 1 and 2, the inset panel 4 is patterned. FIG. 4 is an enlarged perspective view of the vicinity of the hook attachment slit t provided in the first frame 11A, and FIG. 5 is an enlarged perspective view of the vicinity of the hook attachment slit t provided in the second frame 11B. FIG. 6 is an exploded perspective view of the main unit S1. 7 is an exploded perspective view of the connecting member 16. FIG. In addition, in FIG. 7, the connecting member main body 162 is partially broken and shown. FIG. 8 shows the hook 14 of the present embodiment, where (a) is a front view of the hook, (b) is a side view of the hook, and (c) is a perspective view of the hook. . In addition, in (b) of FIG. 8, the shelf board 12 and the support|pillar 15 are shown with the imaginary line. 9 is a sectional view showing the state before the screw 161 is screwed into the nut 162e of the connecting member main body 162, and FIG. 10 is a sectional view showing the state after the screw 161 is screwed into the nut 162e of the connecting member main body 162. be. 9 and 10 are central cross-sectional views taken at the center of the second frame 11B in the depth direction, and the claw 163 on the side where the lower edge 163b1 is in contact with the lower edge of the slit u on the side surface of the column 15. FIGS. Although the lower edges 163b1 and 163b2 of both claws 163 do not appear in FIG. It is shown in FIG. FIG. 11 is an exploded perspective view showing a connection mode of the orthogonal additional unit S2 to the main unit S1. FIG. 12 is an exploded perspective view showing how the third frame 11C is attached to the strut 15B. FIG. 13 is an exploded perspective view of the connecting member 18 for increasing the number of stations. In addition, in FIG. 13, the connection member main body 162 is partially broken and shown. FIG. 14 is a plan sectional view cut along a plane corresponding to the frames 11A to 11C of the second stage of the shelf S. As shown in FIG. FIG. 15 is an enlarged plan cross-sectional view of the vicinity of the pipe member connecting portion X. FIG. In addition, in FIG. 15, the second and third frames 11B and 11C are indicated by imaginary lines. 14 and 15, the side plate 162b and the claws 163, 183 of the connecting members 16, 18 are indicated by thick lines. FIG. 16 is an exploded perspective view showing how the second and third frames 11B and 11C are attached to the strut 15B.

According to the pipe member connection structure described above, the claws 163 and 183 of the second and third frames 11B and 11C (second and third pipe members) are inserted into the strut 15 (first pipe member). The dimensions can be reasonably secured, and the degree of freedom in assembling the frames 11B and 11C to the strut 15 can be increased. That is, with such a configuration, a gap SS is formed between the insertion ends 163a of each of the two claws 163 on the side of the frame 11B that are inserted into the column 15B, and the third gap SS is formed in the gap SS. 1 claw 183 on the frame 11C side of the frame 11C. Therefore, the claws 163 and 183 are densely arranged in the space inside the column 15B. , the constraint that the insertion dimension of the claws 163 and 183 with respect to the strut 15B must be reduced is relaxed. Therefore, it is possible to make the strut 15B thinner without lowering the connection strength of the claws 163 and 183, thereby improving the degree of freedom in design.

Further, according to such a configuration, the claws 163 on the second frame 11B side and the claws 183 on the third frame 11C side do not engage with each other either inside or outside the column 15, so that the frames 11B and 11C do not engage with each other. can be freely attached and detached without affecting the other frames 11C and 11B. For example, two straight frames 11B (second pipe member) and a frame 11C (third pipe member) orthogonal to these frames 11B are connected to the support 15B at the same height position. At the connecting portion X, only the third frame 11C can be removed from the column 15B by loosening the screws 181 and extracting the claws 183 on the side of the third frame 11C from the slit u2 of the column 15B. The connection relationship between the second frame 11B and the strut 15B can be maintained as it is. After the third frame 11C is removed, only the slit u2 remains in the post 15B, and the claws 163 and the like of the second frame 11B are never exposed to the outside.

In this embodiment, the pipe member connecting portions X are arranged in pairs on both sides of the pillars 15B (first pipe member) so that the second frame 11B (second pipe member) is in a straight line. Since the present invention is applied to the second and third frames 11B and 11C, the support 15 and the frames 11B and 11C can be firmly connected at the T-shaped portions.

In addition, this invention is not limited to embodiment described above.

For example, in the above-described embodiments, the present invention is applied to the joint structure of the first to third pipe members each having a prismatic pipe shape. The present invention may be applied to joint structures.

In the above-described embodiment, a pair of claws are provided on the second pipe member side, and only one claw is provided on the third pipe member side. The number and position of each claw may be set arbitrarily as long as the end faces the side surface of the claw on the third pipe member side and does not cross. However, if the number and positions of the claws are set as in the embodiment described above, the claws can be arranged at high density with a simple configuration.

Furthermore, in the above-described embodiment, the second and third pipe members are attached to the first pipe member via connecting members having claws, and the connecting members are accommodated inside the corresponding pipe members. A connecting member body and claws projecting from the connecting member body and extending to the outside from the tip of a corresponding pipe member, wherein the connecting member body is connected to the second and third pipes by a single screw. between the main body of the connecting member and the pipe member, using the tightening force of the screw to press the tip of the pipe member against the peripheral wall of the first pipe member. Although the structure provided with the mechanism is adopted, another structure such as providing a claw at the tip of the pipe member may be adopted. However, if a configuration using the connecting member and the pipe member press-contact mechanism as described above is adopted, the tightening force of a single screw can be used to force the tips of the second and third pipe members to the first pipe member. These pipe members can be strongly connected by pressing against the peripheral wall and with a simple construction.

In addition, in the above-described embodiment, the joint structure of the pipe members connecting the second and third pipe members (second and third frames) extending horizontally to the first pipe member (post) extending vertically. A pipe member joint that connects a horizontally extending first pipe member, a horizontally extending second pipe member perpendicular to the first pipe member, and a vertically extending third pipe member to which the present invention is applied. The present invention may be applied to a structure in which a second vertically extending pipe member is connected to the first horizontally extending pipe member and a third horizontally extending pipe member orthogonal to the first pipe member is connected. Of course, the present invention may be applied to the joint structure of pipe members.

In addition, various modifications may be made without departing from the gist of the present invention.

15 (15A, 15B)... First pipe member (strut)
15s, 15t... Walls (peripheral walls) of the first pipe member
11B... Second pipe member (second frame)
11C... Third pipe member (third frame)
DESCRIPTION OF SYMBOLS 16... Connection member 162... Connection member main body 163... Claw on the side of the second pipe member 18... Connection member (for increasing the number of stations) 183... Claw on the side of the third pipe member z... Tips of the second and third pipe members P...Pipe member pressing mechanism

Claims (5)

A first pipe member having a pipe shape and having slits in substantially orthogonal directions, and a second and third pipe member that are attached to the walls of the first pipe member in orthogonal postures by inserting claws into the slits. and a pipe member of
The claws on the second pipe member side and the claws on the third pipe member side are arranged inside the first pipe member, and the claws on one pipe member side face the side surfaces of the claws on the other pipe member side. and the number and position of each claw are set so as not to cross each other. 2. The joint structure of pipe members according to claim 1, wherein said second pipe members are arranged in pairs on both sides of said first pipe member in a straight posture. 3. The pipe member joint structure according to claim 1, wherein a pair of claws are provided on the second pipe member side, and only one claw is provided on the third pipe member side. The second and third pipe members are attached to the first pipe member via the connection member having the hook, and the connection member is a connection member housed inside the corresponding pipe member. 4. A pipe member joint structure according to claim 1, 2 or 3, comprising a member main body and said hook projecting from said connecting member main body and extending outward from the tip of the corresponding pipe member. The connecting member main body is fastened to the corresponding second and third pipe members by a single screw, and the tightening force of the screw is applied between the connecting member main body and the pipe member. 5. The pipe member joint structure according to claim 4, further comprising a pipe member pressing mechanism for pressing the tip of said pipe member against the peripheral wall of said first pipe member.

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